IL305905A - Composite scaffold for the repair, reconstruction, and regeneration of soft tissues - Google Patents
Composite scaffold for the repair, reconstruction, and regeneration of soft tissuesInfo
- Publication number
- IL305905A IL305905A IL305905A IL30590523A IL305905A IL 305905 A IL305905 A IL 305905A IL 305905 A IL305905 A IL 305905A IL 30590523 A IL30590523 A IL 30590523A IL 305905 A IL305905 A IL 305905A
- Authority
- IL
- Israel
- Prior art keywords
- composite scaffold
- approximately
- support structure
- scaffold
- microporous matrix
- Prior art date
Links
- 239000002131 composite material Substances 0.000 title claims 44
- 230000008929 regeneration Effects 0.000 title 1
- 238000011069 regeneration method Methods 0.000 title 1
- 210000004872 soft tissue Anatomy 0.000 title 1
- 239000011159 matrix material Substances 0.000 claims 15
- 239000011148 porous material Substances 0.000 claims 14
- 238000000034 method Methods 0.000 claims 12
- -1 poly(ortho esters) Polymers 0.000 claims 7
- 239000011800 void material Substances 0.000 claims 6
- 239000006260 foam Substances 0.000 claims 5
- 238000001125 extrusion Methods 0.000 claims 4
- 239000000835 fiber Substances 0.000 claims 3
- 229920001223 polyethylene glycol Polymers 0.000 claims 3
- 239000000126 substance Substances 0.000 claims 3
- 102000008186 Collagen Human genes 0.000 claims 2
- 108010035532 Collagen Proteins 0.000 claims 2
- 239000002202 Polyethylene glycol Substances 0.000 claims 2
- 239000000654 additive Substances 0.000 claims 2
- 229920001436 collagen Polymers 0.000 claims 2
- 238000004132 cross linking Methods 0.000 claims 2
- 238000005187 foaming Methods 0.000 claims 2
- 238000004108 freeze drying Methods 0.000 claims 2
- 239000000017 hydrogel Substances 0.000 claims 2
- 238000009940 knitting Methods 0.000 claims 2
- 238000002386 leaching Methods 0.000 claims 2
- 239000000463 material Substances 0.000 claims 2
- 229920005615 natural polymer Polymers 0.000 claims 2
- 229920000642 polymer Polymers 0.000 claims 2
- 238000000807 solvent casting Methods 0.000 claims 2
- 125000006850 spacer group Chemical group 0.000 claims 2
- ZLUFYQVHJAVDHU-IHWYPQMZSA-N (6z)-2-methyl-2,3-dihydro-1,4-dioxocine-5,8-dione Chemical compound CC1COC(=O)\C=C/C(=O)O1 ZLUFYQVHJAVDHU-IHWYPQMZSA-N 0.000 claims 1
- 229920002732 Polyanhydride Polymers 0.000 claims 1
- 229920000954 Polyglycolide Polymers 0.000 claims 1
- 229920001710 Polyorthoester Polymers 0.000 claims 1
- 229920001577 copolymer Polymers 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 claims 1
- 230000008025 crystallization Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
- 229920001519 homopolymer Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229920000771 poly (alkylcyanoacrylate) Polymers 0.000 claims 1
- 229920001308 poly(aminoacid) Polymers 0.000 claims 1
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 claims 1
- 229920000747 poly(lactic acid) Polymers 0.000 claims 1
- 229920002463 poly(p-dioxanone) polymer Polymers 0.000 claims 1
- 229920002627 poly(phosphazenes) Polymers 0.000 claims 1
- 229920001610 polycaprolactone Polymers 0.000 claims 1
- 239000004632 polycaprolactone Substances 0.000 claims 1
- 239000000622 polydioxanone Substances 0.000 claims 1
- 239000004633 polyglycolic acid Substances 0.000 claims 1
- 229920000903 polyhydroxyalkanoate Polymers 0.000 claims 1
- 239000004626 polylactic acid Substances 0.000 claims 1
- 229920002959 polymer blend Polymers 0.000 claims 1
- 229920002635 polyurethane Polymers 0.000 claims 1
- 239000004814 polyurethane Substances 0.000 claims 1
- 229920002451 polyvinyl alcohol Polymers 0.000 claims 1
- 239000004753 textile Substances 0.000 claims 1
- YFHICDDUDORKJB-UHFFFAOYSA-N trimethylene carbonate Chemical compound O=C1OCCCO1 YFHICDDUDORKJB-UHFFFAOYSA-N 0.000 claims 1
- 238000009941 weaving Methods 0.000 claims 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249978—Voids specified as micro
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2484—Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/40—Knit fabric [i.e., knit strand or strip material]
- Y10T442/419—Including strand precoated with other than free metal or alloy
Claims (41)
1.Claims1. A composite scaffold comprising: a three-dimensional support structure defined by first and second outer layers separated by an interior space, a plurality of spacer elements extending through the interior space and connecting the first and second outer layers; and a microporous matrix disposed in the interior space and having a multitude of interconnected pores collectively defining void space between first and second outer layers of the support structure.
2. The composite scaffold of claim 1 wherein at least approximately 60% of the void space comprises pores having a size dimension of at least 10 μm or greater. 3. The composite scaffold of claim 1 wherein a volume of the void space is between approximately
3.0 cm/gram and 9.0 cm/gram.
4. The composite scaffold of claim 1 wherein composite scaffold has a cross sectional area of approximately between 3 mm and 250 mm, and wherein the cross-sectional area changes less than approximately 17% at a strain percentage of 13%.
5. The composite scaffold of claim 1 wherein a surface area of the composite scaffold is between approximately 0.3 m/gram and 1.5 m/gram.
6. The composite scaffold of claim 1 wherein the composite scaffold has an ultimate stress of approximately between 2.5 MPa and 30 MPa.
7. The composite scaffold of claim 1 wherein the composite scaffold has a yield stress of approximately between 2.5 MPa and 30 MPa.
8. The composite scaffold of claim 1 wherein the composite scaffold has a modulus of approximately between 2.5 MPa and 70 MPa, wherein modulus is calculated using a cross-sectional area of material comprising the composite scaffold and the void space.
9. The composite scaffold of claim 1 wherein the composite scaffold has a modulus of approximately between 150 MPa and 600 MPa, wherein modulus is calculated using a cross-sectional area of only material comprising the composite scaffold.
10. The composite scaffold of claim 1 wherein the three-dimensional support structure comprises a three-dimensional textile structure.
11. The composite scaffold of claim 1 wherein the microporous matrix comprises any of a sponge, foam, or textured fibers or yarns, or any combination thereof.
12. The composite scaffold of claim 1 wherein the microporous matrix comprises any of a freeze-dried sponge, open cell extrusion foam, particulate leached sponge, or any combination thereof.
13. The composite scaffold of claim 11 wherein the microporous matrix comprises any of a sponge, foam, or textured fibers or yarns, or any combination thereof disposed within the scaffold by any of knitting, weaving, lyophilization, particulate leaching, open cell extrusion, solvent casting, solid-state foaming, and cross-linking.
14. The composite scaffold of claim 1 wherein the microporous matrix comprises one of collagen and hydrogel.
15. The composite scaffold of claim 1 wherein the three-dimensional support structure comprises monofilament, multifilament, or textured yarns, or any combination thereof, knitted into a three-dimensional structure.
16. The composite scaffold of claim 1 wherein the three-dimensional support structure comprises any combination of synthetic bioresorbable polymers, natural polymers and/or additives.
17. The composite scaffold of claim 1 wherein the three-dimensional support structure comprises any of homopolymers, copolymers, or polymer blends of any of the following: polylactic acid, polyglycolic acid, polycaprolactone, polydioxanone, polyhydroxyalkanoates, polyanhydrides, poly(ortho esters), polyphosphazenes, poly (amino acids), polyalkylcyanoacrylates, poly(propylene fumarate, trimethylene carbonate), poly(glycerol sebacate), poly(glyconate), poly(ethylene glycol), poly(vinyl alcohol) and polyurethane, or any combination thereof.
18. The composite scaffold of claim 1 wherein at least approximately 70% of the void space comprises pores having a size dimension of 10 μm or greater.
19. The composite scaffold of claim 1 wherein at least approximately 80% of the void space comprises pores having a size dimension of 10 μm or greater.
20. The composite scaffold of claim 1 wherein the composite scaffold has a stiffness of approximately between 2.5 N/mm and 25 N/mm.
21. The composite scaffold of claim 1 wherein the composite scaffold has an ultimate load of approximately between 20% and 70%.
22. The composite scaffold of claim 1 wherein the composite scaffold has an ultimate load approximately between 100 N and 200 N.
23. The composite scaffold of claim 1 wherein a surface area of the composite scaffold is between approximately 0.3 m2/gram and 15.0 m2/gram.
24. The composite scaffold of claim 1 wherein a surface area of the composite scaffold is between approximately 0.6 m2/gram and 1.2 m2/gram.
25. The composite scaffold of claim 1 wherein a surface area of the composite scaffold is between approximately 0.7 m2/gram and 1.0 m2/gram.
26. The composite scaffold of claim 1 wherein the microporous matrix comprises a multitude of interconnected pores having a median pore size of between approximately 10 μm to 100 μm.
27. The composite scaffold of claim 1 wherein the microporous matrix comprises a multitude of interconnected pores having a median pore size of between approximately 12 μm to 70 μm.
28. The composite scaffold of claim 13 wherein the microporous matrix comprises a multitude of interconnected pores having a median pore size of between approximately 20 μm to μm.
29. A method of making a composite scaffold comprising: A) constructing a three-dimensional support structure by knitting a scaffold comprising first and second layers spaced apart to define an interior space therebetween but attached together by a plurality of spacer elements extending through the interior space, the support structure extending along a length dimension between first and second ends thereof; and B) forming a microporous matrix within the interior space, the microporous matrix having a multitude of interconnected pores in fluid communication with exterior surfaces of the support structure, wherein a plurality of the interconnected pores are oriented relative to a dimensional characteristics of the support structure.
30. The method of claim 29 wherein the plurality of interconnected pores are oriented radially inward into the interior space from exterior surfaces of the support structure.
31. The method of claim 29 wherein the plurality of interconnected pores are oriented towards the length dimension of the support structure.
32. The method of claim 29 wherein the support structure has an exterior profile and B) comprises: B1) disposing the support structure into a solution filled mold having a cross-sectional profile which at least partially mimics the exterior profile of the support structure, and B2) changing the temperature of the mold to cause crystallization of the solution within the interior space of the support structure.
33. The method of claim 29 further comprising: C) at least partially covering the support structure with a hydrophilic substance.
34. The method of claim 33 wherein at least partially covering the three-dimensional support structure with a hydrophilic substance occurs before disposing a microporous matrix within the interior space.
35. The method of claim 33 wherein the hydrophilic substance at least partially comprises polyethylene glycol (PEG).
36. The method of claim 29 wherein the microporous matrix comprises one of collagen and hydrogel.
37. The method of claim 29 wherein the support structure comprises a scaffold comprises any combination of synthetic bioresorbable polymers, natural polymers and/or additives.
38. The method of claim 37 wherein the scaffold comprises monofilament, multifilament, or multifilament and textured yarns, or any combination thereof, knitted into a three-dimensional structure.
39. The method of claim 29 wherein the microporous matrix comprises any of a sponge, foam, or textured fibers or yarns, or any combination thereof.
40. The method of claim 29 wherein the microporous matrix comprises any of a freeze-dried sponge, open cell extrusion foam, particulate leached sponge, or any combination thereof.
41. The method of claim 29 wherein B) comprises forming the microporous matrix by any of lyophilization, particulate leaching, open cell extrusion, solvent casting, solid-state foaming, and cross-linking.
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IL305905A IL305905A (en) | 2019-02-07 | 2020-02-07 | Composite scaffold for the repair, reconstruction, and regeneration of soft tissues |
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2020
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